Exmark Metro Brake Band squeals

I have a new 48" Metro that I use at my house. After about 12 hours the right wheel brake band began to squeal. It seems that the left hand band is under enough tension such that it pulls the brake rod down to where the wing nut stops it and the band is released.

However, the right band does not have enough tension and the brake rod is not pulled all the way down. The band then does not pull all the way out resulting in the squealling. I have lubricated the brake arm at the pivot point.

Is there any adjustment I can make to have this band release completely to stop this annoying squeal? Any other ideas?